84477391 has 2 divisors, whose sum is σ = 84477392. Its totient is φ = 84477390.

The previous prime is 84477373. The next prime is 84477409. The reversal of 84477391 is 19377448.

It is a balanced prime because it is at equal distance from previous prime (84477373) and next prime (84477409).

It is a cyclic number.

It is not a de Polignac number, because 84477391 - 2⁵ = 84477359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84477361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42238695 + 42238696.

It is an arithmetic number, because the mean of its divisors is an integer number (42238696).

Almost surely, 2^84477391 is an apocalyptic number.

84477391 is a deficient number, since it is larger than the sum of its proper divisors (1).

84477391 is an equidigital number, since it uses as much as digits as its factorization.

84477391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 84477391 is about 9191.1583056762. The cubic root of 84477391 is about 438.7800071468.

The spelling of 84477391 in words is "eighty-four million, four hundred seventy-seven thousand, three hundred ninety-one".